Photographic film.



w. B. FEATHERSTONE.

PHOTOGRAPHIC FILM. APPLICAT1ON FILED Ausfx, 1910.

1, 1%,41 0O Patented July 1915.

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TWILLARD B. FEATHERSTONE, OF WASHINGTON, DISTRICT OF COLUMBIA, A SS IGN OE' TO H. P. PATIENTS AND PROCESSES COMPANY, INC., A CORPORATION OF NEQWYQ V rnoroenarnrc FILM.

LMLSALILO.

Specification of Letters Patent.

Patented July 6, 1915.

Application filed August 1, 1910. Serial No. 574,954.

To alt whom it may concern:

Be it known that I, VILLARD B. EnATrmR- STONE, a citizen of the United States, residing at \Vashington, in theDistrict of Columbia, have invented certain new and useful Improvements in Photographic Films, of which the following is a specification.

My invention relates to the recording and projection of photographs in natural colors,

and has for its object to provide a simple,

convenient and inexpensive means to filter all but certain desired colors from incident rays of light. I accomplish this by the use of a colored backing or support for the emulsion, such as the transparent celluloid commonly used in the manufacture of photographic films, the photographs being taken and projected through the colored support.

in the accompanying drawings :-Figure 1 shows a three colored backing or support, partly covered with emulsion. Fig. 2 shows a strip of film whose translucent backlngior'the emulsion is 'of two different colors.

Fig. 3 shows the support colored on its surface instead of throughout itsmass. Fig. shows a'double-row strip with three colors alternating in each row.

The letters, it, G and B, in the several figures indicate the colors, red, green and blue iiolet respectively, as pertaining to the color values of. the potential images, which are bounded by the dotted lines in the several figures.

The vari colored strips are useful in taking photographs, as well as in projecting them. In the former process the colored support'is toward the lens, and in the latter to it will ordinarily be away from the objective lens, but may be either way.

In practice there are several ways of col-' oring the transparent support for the photographic emulsion, but T prefer one of the following.

The celluloid or other substance is made up colored. and pressed into cakes which are joined andamalgamated substantially o the lines shown in the several drawings,

aiter which the vari-colored mass is sheeted ofi in layers, which will, of course, have the colors similarly distributed.

Another method is to take ordinary clear celluloid, and, after removing the gloss, print the colors on, either in a press or by a continuous process, such as drawing the long strips through spongy pads'suitably impregnated with dyes. i

I am aware that colored celluloid has been used for color filters, but I am not aware and do not believe that the transparent body upon which the emulsion is mounted has ever been stained or dyed as above described -for-the purpose of doing away with separate filters- In the-claims the words image and picture-factor are used to designate that monochromatic portion of a full image which is transmissible by a single colored section of the support, to be impressed upon the emulsion. The word f potential is used as designating the images or partial images which. will form just beyond the color-filtering areas when the film is used in a camera, and which will cause, upon development, monochromatic negatives or picture factors.

A primary color is held to be any color H which, when projected with one or more other 1 colors by suitable means and in proper combinations, will reproduce substantially the natural colorings of ordinary objects. Monochromatic is also used approximately to denote the separate color values of the negative factors, which when made positive by printing, and combined by projection orotherwise, will reproduce the original colors of the object photographed.

The word translucent is used in its broad sense, as applying to all such physical conditions as permit light to shine through, including so-called transparent substances as well as those which are not entirely transparent.

The scope of this invention is not limited to the exact styles of films shown and described, its principal object being to provide a color-filtering support for light-sensitive emulsion, particularly doing away with separate filters for making monochromatic negatives, or combinable parts of color pictures.

ll claim 1. A photographic film comprising a translucentjstrip having a series of exposure field sections, adjacent ones of which difi'er said {strip having a .phOtographically' sensi-' from each other in color, said strip having a photographlcally sensitlve coating upon one of its surfaces.

'i'sciiisations, said strip having a photograph- I 2. A. photographic film comprising a translucent strip having a series of exposure translucent strip having a series of 'exposurefield sections, adjacent ones of which differfrom each other in color, arranged in lregu: larly recurring order longitudinally thereof,

said strip-having a photographicallyfsensitive coating upon'one of-its surfaces.

l. A photographic film comprisingrya' translucent strip having a series ofgex posur'e field sections, adjacentiones of which difier" ically sensitive. coating upon one ofits surfaces.

. 7. A photographic film comprising a translucent strip having a plurality of laterally arranged longitudinal series of exposure field sections, longitudinally adjacent ones of which differ from each other in color, the colors regularly recurring longitudinally, said strip having a photographically sensitive coating upon one of its surfaces. '8. A photographic film comprising a translucent strip having a plurality of laterally arranged-longitudinal series of extudinally, said strip having a photograph-- from each other in color, arranged'inregularIy'recurring order longitudinally.thereof, I j j d [f 94A photographic film comprising a the colors of'said sections suhstantially'cor responding to the primary color sensations,

" tive coating upon onei'of: its surfaces.

5.- A photographic, film I comprising atranslucentstriphaving a plurality of laterally arranged longitudinal series of exposure field sections, longitudinally adja centones of Whichdiffer from each other in color, said strip having" a photographically sensitive'coating upon-one of its surfaces.

6. A photographic. film comprising a translucent strip havingsa'plurality of laterally arranged longitudinal series. of exposure field sections, longitudinally adjacent ones of 'Which differ from each other. in

posurefield sections, longitudinally adjacent ones'of which differ from each other in color, the colors of' said sections. substantially corresponding to the primary color sensations and regularly recurring longi ically faces.

translucent strip havinga series of-consecui tive ezrposure field sections, successive 01195 of which dlfi'er from each other in color,

said strip having a photographically sensitive coating upon one of its' surfaces.

.10; A photographic film comprising; a

sensitive coating upon one of its'-sur-- translucent strip having a series of consecu? tive exposure field sections, successive ones of which d ffer from each other in color, the

. colors of said sections substantially correcolor, the colors of said sections substan-.'

spondingto the primary color sensations, said strip having a photographically' sensitive coating uponone of its surfaces.

WILLARD B. FEATHERSTONE. ln the presence of- J. C. PRATT,

P. C. NIELsEN, r. 

